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漂亮的線程代碼java,編譯線程數(shù)

求一個(gè)JAVA多線程例子,最好有代碼,謝謝啦!

package a.b.test;

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import java.util.Date;

import java.util.concurrent.Callable;

import java.util.concurrent.ExecutorService;

import java.util.concurrent.Executors;

import java.util.concurrent.Future;

public class Calculate1000 implements CallableInteger{

public Calculate1000(){}

public Calculate1000(int a, int b){

this.a = a;

this.b = b;

}

int a;

int b;

/**

* @param args

* @throws Exception

*/

public static void main(String[] args) throws Exception {

//同步

Calculate1000 ca1 = new Calculate1000();

Date ds1 = new Date();

int result = 0;

for(int i = 1 ; i = 1000 ; i++){

result = ca1.add(i, result);

}

System.out.println(result);

System.out.println("同步用時(shí)" + (new Date().getTime() - ds1.getTime()) + "MS");

//異步

Date ds2 = new Date();

result = 0;

ExecutorService es = Executors.newFixedThreadPool(2);

FutureInteger future1 = es.submit(new Calculate1000(1,500));

FutureInteger future2 = es.submit(new Calculate1000(501,1000));

result = future1.get() + future2.get();

System.out.println(result);

System.out.println("異步用時(shí)" + (new Date().getTime() - ds2.getTime()) + "MS");

es.shutdown();

}

private int add(int a, int b) throws Exception{

Thread.sleep(10);

return a + b;

}

@Override

public Integer call() throws Exception {

int res = 0;

for(int i = a ; i = b ; i++){

res = this.add(res, i);

}

return res;

}

}

樓主你試一下這段代碼行不行,行的話請(qǐng)采納!

java中線程編程代碼怎么寫(xiě)啊

線程用到Thread或者Runnable接口(Thread也操作了Runnable接口)

繼承了Thread類(lèi)后需要重載其run方法,在方法里寫(xiě)你需要完成的事情,開(kāi)始線程是調(diào)用其start方法。

操作Runnable接口必須實(shí)現(xiàn)其run方法,在方法里寫(xiě)你需要完成的事情,Runnable接口沒(méi)有start方法,所以啟動(dòng)線程還是需要依靠Thread類(lèi) new Thread(Runnable runnable).start();

一般項(xiàng)目中多是操作接口,因?yàn)轭?lèi)只能單繼承,接口可以操作多個(gè)。

java線程的經(jīng)典代碼

package threadgroup;

class ThreadDemo3 extends Thread {

private String name;

private int delay;

public ThreadDemo3(String sname, int i_delay) {

name = sname;

delay = i_delay;

}

public void run() {

try {

sleep(delay);

} catch (InterruptedException e) {

}

System.out.println("多線程測(cè)試!\n" + name + "\n" + delay);

}

}

public class testMyThread {

public static void main(String[] args) {

ThreadDemo3 th1,th2,th3;

th1 = new ThreadDemo3("線程1", (int) (Math.random() * 900));

th2 = new ThreadDemo3("線程2", (int) (Math.random() * 900));

th3 = new ThreadDemo3("線程3", (int) (Math.random() * 900));

th1.start();

th2.start();

th3.start();

}

}

package threadgroup;

public class threadDemo {

public static void main(String[] args) {

Thread t = Thread.currentThread();

t.setName("你好嗎?");

System.out.println("正在進(jìn)行的Thread是:" + t);

try {

for (int i = 0; i 5; i++) {

System.out.println("我不叫穆繼超" + i);

Thread.sleep(3000);

}

} catch (Exception e) {

// TODO: handle exception

System.out.println("Thread has wrong" + e.getMessage());

}

}

}

package threadgroup;

public class threadDemo2 implements Runnable {

public threadDemo2() {

Thread t1 = Thread.currentThread();

t1.setName("第一個(gè)主進(jìn)程");

System.out.println("正在運(yùn)行" + t1);

Thread t2 = new Thread(this, "");

System.out.println("在創(chuàng)建一個(gè)進(jìn)程");

t2.start();

try {

System.out.println("使他進(jìn)入第一個(gè)睡眠狀態(tài)");

Thread.sleep(2000);

} catch (InterruptedException e) {

System.out.println("Thread has wrong" + e.getMessage());

}

System.out.println("退出第一個(gè)進(jìn)程");

}

public void run() {

try {

for (int i = 0; i 5; i++) {

System.out.println("進(jìn)程" + i);

Thread.sleep(3000);

}

} catch (InterruptedException e) {

// TODO: handle exception

System.out.println("Thread has wrong" + e.getMessage());

}

System.out.println("退出第二個(gè)進(jìn)程");

}

public static void main(String[] args) {

new threadDemo2();

}

}

Java多線程代碼,求注釋?zhuān)皆敱M越好!有點(diǎn)急,謝謝!

這段代碼的功能是顯示各個(gè)時(shí)區(qū)當(dāng)前時(shí)鐘。

TimerListener是一個(gè)接口,有一個(gè)timeElapsed方法,目的是根據(jù)當(dāng)前的時(shí)間繪制時(shí)鐘,并刷新顯示。

Timer繼承Thread類(lèi),實(shí)現(xiàn)了run方法。run方法中,休眠指定的時(shí)間,并調(diào)用TimerListener的timeElapsed方法。如上例就是每休眠1S調(diào)用一次,所以看到的結(jié)果就是每1S繪制的時(shí)鐘會(huì)更新一次。

ClockCanvas繼承JPanel并實(shí)現(xiàn)了TimerListener接口,在構(gòu)造方法中,根據(jù)指定的時(shí)區(qū)得到calendar實(shí)例。并開(kāi)啟線程Timer。

重寫(xiě)了paintComponent方法,在該方法中,首先繪制了一個(gè)圓,然后分別繪制時(shí)針、分針和秒針。

時(shí)針顏色為紅色,分針為黃色,秒針為藍(lán)色。在時(shí)鐘下面繪制了城市,顏色為黑色。

新聞標(biāo)題:漂亮的線程代碼java,編譯線程數(shù)
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